WSN中能量有效的分层协作覆盖模型

摘要

针对传统网络覆盖模型仅以区域覆盖率作为评价标准,而未考察不同覆盖模型下节点能量有效性问题,在协作覆盖模型的基础上,提出了能量有效的分层协作覆盖模型EEHCCM(energy efficient hierarchical collaboration coverage model),并应用蚁群优化算法进行求解.该模型通过对目标区域进行分层,并优化各个层内的节点数目来实现节点能量的能耗均衡.提出了基于分层协作覆盖模型的启发式因子和全覆盖条件下节点数量的上下限的计算方法.通过Matlab仿真实验,其结果表明,应用EEHCCM模型实现目标区域节点的部署,在同等覆盖能力下,网络的生存时间可以得到较大的提升,与传统的覆盖算法相比,更适用于实际的节点部署.%Since the node's energy dissipation model is not taken in to account in the traditional coverage models, based on the collaboration coverage model, the energy efficient hierarchical collaboration coverage model is proposed, which can evenly balance the energy dissipation among different layers in the target monitor area. This paper solves two specific problems in the ant colony solution. They are a formula of heuristic factor calculating for the model and the upper and lower bounds of node numbers. Simulations in Matlab show that the proposed model is more suitable for practical deployment which can evidently prolong the network lifetime.